Malicious PDF — malware analysis report

Static analysis result for SHA-256 eead122f32f152ae…

MALICIOUS

PDF

71.5 KB Created: 2021-09-14 08:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ef575bd64a630071dee4728152a0547a SHA-1: b9d5bb375fef5f90f3dcc6820a66ed9bac7053bd SHA-256: eead122f32f152ae8d4bdcd2a1f81a36b7f8d7a34611a9d37d10bdf127df4ed4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs that point to suspicious domains, suggesting it functions as a link farm or phishing lure. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports its role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=link+download+game+psp PDF link annotation
    • https://fleschimmo.lu/userfiles/files/tobeti.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/titomidovazagumefiregora.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/bivulinelofusanopokiriwad.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/manureboza.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c36571743f---14535126743.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/navavefinojunilemizu.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/tevepigobavub.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/33258858987.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/96546692787.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/52875253320.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/62344484753.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/simaxa.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/74354981982.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/31489307287.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/luwapozavitulivodoz.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/kiwijemilajegirak.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/fajijo.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/92878572224.pdfIn PDF document text
    • https://anandalaya.in/resources/file/bukibi.pdfIn PDF document text
    • http://wpchkg.com/upload/image/file/69354009567.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/03737253f919ca518b8746f0f625642c/22365799067.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/69867432281.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB636 16464 bytes
SHA-256: f82de69165123bf4e382c80cf7648ff2fcff899b2e1bb9b46a206b83e84e377b
font_01_sfnt_off0000e02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02D 10672 bytes
SHA-256: 037fb222bf9fb54d2f0b5f9aee5daed49982792a5756e3a065f042a8489e730e
font_02_sfnt_off0000f863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF863 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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